Distributions
For any distribution, what must the total area under the probability curve equal?
1
If two events A and B cannot possibly happen at the same time, what term describes them?
Mutually Exclusive
E M N A
MEAN
Two events are ________ if knowing that one event occurred gives no information about whether the second event will occur.
Independent.
“The two in the middle of the box graph thing”
Quartiles
Which discrete probability distribution is defined by a fixed number of independent trials and a constant probability of success?
Binomial Distribution
If the probability of an event occurring is 0.35, what is the probability of its complement occurring?
0.65
O P I S N S O
POISSON
To model independent events occurring randomly in a continuous space or time interval at a constant rate, we use the ________ distribution.
Poisson
“The curve has two high bits and look like cat ears”
Bimodal
In a perfectly symmetrical Normal distribution, which of the measures of centre can be used?
Mean, median, mode
All 3. Mean, Median and Mode
Events A and B are independent, with P(A) = 0.4 and P(B) = 0.5. What is P(A and B)?
P(A and B) = 0.2
R A V I C A N E
Variance
The ________ is calculated by multiplying the probability with the number of trials
Expected number
“Something you should give Mr Boon more”
Compliment
A continuous Uniform distribution has the parameters a = 2 and b = 10
What is the height of this distribution?
1/8
P(A) = 0.3 and P(A and B) = 0.2.
What is the conditional probability P(B|A)?
0.67
C E N T E R I S
INTERSECT
Poisson and Binomial distributions are the only two ________ distributions we use. The others are continuous.
Discrete
"The amount that things change from what is standard"
Standard Deviation
What is the formula for finding the height of a triangular distribution anywhere to the right of the mean
height = (2(x-a))/((b-a)(c-a))
In a study, 12% of a treated group experienced side effects compared to 30% of an untreated control group. What is the relative risk of side effects for the treated group relative to the control group?
M U T A L S I O N E U S ( O T N )
SIMULTANEOUS (NOT)
Calculated as the square root of the variance, the _________________ gives a measure of spread.
Standard Deviation
“The chance of a bad thing compared to the chance of a bad thing"
Relative Risk